From owner-freebsd-amd64@FreeBSD.ORG  Fri Dec  8 17:25:43 2006
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Date: Fri, 8 Dec 2006 09:22:16 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: kael@sonic.net
Message-ID: <20061208172215.GA50992@troutmask.apl.washington.edu>
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Cc: freebsd-amd64@freebsd.org
Subject: Re: ldexpf in 6.x amd64
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On Fri, Dec 08, 2006 at 08:28:18AM -0800, Kael Fischer wrote:
> I have 14 intel blades running 6.0-R.  ldexpf is missing on these
> systems (ldexp, and ldexpd are in libm.so).  I know this has come up
> before on various  lists, but I am looking for a little clarification.
> 
> 1) here is a patch that Steve Kargl proposed on freebsd-current last
> year.  Is this going to do the trick?:
> 
> --- /usr/src/lib/msun/src/e_scalbf.c.orig       Mon Dec  5 13:29:47 2005
> +++ /usr/src/lib/msun/src/e_scalbf.c    Mon Dec  5 13:28:53 2005
> @@ -42,3 +42,5 @@
>        return scalbnf(x,(int)fn);
>  #endif
> }
> +
> +__weak_reference(scalbf, ldexpf);
> 

I believe you want revision 1.8 of s_scalbnf.c.
If I read
 http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/msun/src/s_scalbnf.c
correctly, 6.0 should already contain ldexpf.

> 2) is 'cd /usr/src/lib/msun; make' sufficient to rebuild libm.so ?

yes.

-- 
Steve